java.lang.Object | |
↳ | java.security.spec.PSSParameterSpec |
This class specifies a parameter spec for RSA-PSS signature scheme, as defined in the PKCS#1 v2.1 standard.
Its ASN.1 definition in PKCS#1 standard is described below:
RSASSA-PSS-params ::= SEQUENCE { hashAlgorithm [0] OAEP-PSSDigestAlgorithms DEFAULT sha1, maskGenAlgorithm [1] PKCS1MGFAlgorithms DEFAULT mgf1SHA1, saltLength [2] INTEGER DEFAULT 20, trailerField [3] INTEGER DEFAULT 1 }where
OAEP-PSSDigestAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-sha1 PARAMETERS NULL }| { OID id-sha256 PARAMETERS NULL }| { OID id-sha384 PARAMETERS NULL }| { OID id-sha512 PARAMETERS NULL }, ... -- Allows for future expansion -- } PKCS1MGFAlgorithms ALGORITHM-IDENTIFIER ::= { { OID id-mgf1 PARAMETERS OAEP-PSSDigestAlgorithms }, ... -- Allows for future expansion -- }
Note: the PSSParameterSpec.DEFAULT uses the following: message digest -- "SHA-1" mask generation function (mgf) -- "MGF1" parameters for mgf -- MGF1ParameterSpec.SHA1 SaltLength -- 20 TrailerField -- 1
Fields | |||||||||||
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DEFAULT | The PSS parameter set with all default values. |
Public Constructors | |||||||||||
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Creates a new
PSSParameterSpec as defined in
the PKCS #1 standard using the specified message digest,
mask generation function, parameters for mask generation
function, salt length, and trailer field values. | |||||||||||
Creates a new
PSSParameterSpec
using the specified salt length and other default values as
defined in PKCS#1. |
Public Methods | |||||||||||
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Returns the message digest algorithm name.
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Returns the mask generation function algorithm name.
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Returns the parameters for the mask generation function.
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Returns the salt length in bits.
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Returns the value for the trailer field, i.e.
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Inherited Methods | |||||||||||
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From class
java.lang.Object
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Creates a new PSSParameterSpec
as defined in
the PKCS #1 standard using the specified message digest,
mask generation function, parameters for mask generation
function, salt length, and trailer field values.
mdName | the algorithm name of the hash function. |
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mgfName | the algorithm name of the mask generation function. |
mgfSpec | the parameters for the mask generation function. If null is specified, null will be returned by getMGFParameters(). |
saltLen | the length of salt. |
trailerField | the value of the trailer field. |
NullPointerException | if mdName ,
or mgfName is null. |
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IllegalArgumentException | if saltLen
or trailerField is less than 0. |
Creates a new PSSParameterSpec
using the specified salt length and other default values as
defined in PKCS#1.
saltLen | the length of salt in bits to be used in PKCS#1 PSS encoding. |
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IllegalArgumentException | if saltLen is
less than 0.
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Returns the message digest algorithm name.
Returns the mask generation function algorithm name.
Returns the parameters for the mask generation function.
Returns the salt length in bits.
Returns the value for the trailer field, i.e. bc in PKCS#1 v2.1.